Elvis Presley made the most of his 1968 comeback. Not only was there a televised special and a soundtrack album, it led to a series of Las Vegas residencies that resulted in a documentary feature and another soundtrack album, both titled “That’s the Way It Is” when they were released separately in 1970.

Now the film and soundtrack album are coming together for the first time as part of “Elvis: That’s the Way It Is,” a new eight-CD, two-DVD box set compiling the documentary, the original soundtrack, six complete concert recordings from Presley’s August 1970 Vegas residency and outtakes from rehearsals. Speakeasy today premieres a previously unreleased live version of the singer’s 1956 hit “Heartbreak Hotel.”

This take on the song comes from the “dinner show” on Aug. 12, 1970 (he was performing two shows a night), and after Presley calls out chords, he and the band launch into the song to a wave of applause from the audience at the International Hotel. The King cracks up briefly midway through—it’s not clear why—but otherwise sounds like he’s at the peak of his powers.

Along with other previously unreleased tracks, “Elvis: That’s the Way It Is” features Presley’s versions of “Bridge Over Troubled Water” by Simon & Garfunkel, “You’ve Lost That Loving Feeling” by the Righteous Brothers and “You Don’t Have to Say You Love Me,” which was a hit for Dusty Springfield. The box set is due Aug. 5 on RCA/Legacy Recordings. What do you think of this version of “Heartbreak Hotel?” Leave your thoughts in the comments.